A measurement of the lifetimes of the Ωc0 and Ξc0 baryons is reported using proton–proton collision data at a centre-of-mass energy of 13TeV, corresponding to an integrated luminosity of 5.4fb-1 collected by the LHCb experiment. The Ωc0 and Ξc0 baryons are produced directly from proton interactions and reconstructed in the pK-K-π+ final state. The Ωc0 lifetime is measured to be 276.5±13.4±4.4±0.7fs, and the Ξc0 lifetime is measured to be 148.0±2.3±2.2±0.2fs, where the first uncertainty is statistical, the second systematic, and the third due to the uncertainty on the D0 lifetime. These results confirm previous LHCb measurements based on semileptonic beauty-hadron decays, which disagree with earlier results of a four times shorter Ωc0 lifetime, and provide the single most precise measurement of the Ωc0 lifetime.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., et al. (2022). Measurement of the lifetimes of promptly produced Ωc0 and Ξc0 baryons. SCIENCE BULLETIN, 67(5), 479-487 [10.1016/j.scib.2021.11.022].

Measurement of the lifetimes of promptly produced Ωc0 and Ξc0 baryons

Borsato M.;Calvi M.;Capelli S.;Cardini A.;Carniti P.;Fazzini D.;Garcia Pardinas J.;Gotti C.;Grillo L.;Khanji B.;Kirsebom V. S.;Kucharczyk M.;Martinazzoli L.;Martinelli M.;Meloni S.;Minotti A.;Petruzzo M.;Pizzichemi M.;Salomoni M.;Shields E. B.;
2022

Abstract

A measurement of the lifetimes of the Ωc0 and Ξc0 baryons is reported using proton–proton collision data at a centre-of-mass energy of 13TeV, corresponding to an integrated luminosity of 5.4fb-1 collected by the LHCb experiment. The Ωc0 and Ξc0 baryons are produced directly from proton interactions and reconstructed in the pK-K-π+ final state. The Ωc0 lifetime is measured to be 276.5±13.4±4.4±0.7fs, and the Ξc0 lifetime is measured to be 148.0±2.3±2.2±0.2fs, where the first uncertainty is statistical, the second systematic, and the third due to the uncertainty on the D0 lifetime. These results confirm previous LHCb measurements based on semileptonic beauty-hadron decays, which disagree with earlier results of a four times shorter Ωc0 lifetime, and provide the single most precise measurement of the Ωc0 lifetime.
Articolo in rivista - Articolo scientifico
Charm physics; Charmed baryon; Flavour physics; LHCb; Lifetime; QCD;
English
2022
67
5
479
487
none
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., et al. (2022). Measurement of the lifetimes of promptly produced Ωc0 and Ξc0 baryons. SCIENCE BULLETIN, 67(5), 479-487 [10.1016/j.scib.2021.11.022].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/477699
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